package org.example.filter;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;
//使用 @WebFilter注解声明一个自定义的 Filter
@WebFilter(urlPatterns = ("/myServlet"))
public class MyFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("MyFilter 初始化");
    }
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse
            servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("MyFiler doFilter");
        filterChain.doFilter(servletRequest, servletResponse);
    }
    @Override
    public void destroy() {
        System.out.println("MyFiler 销毁");
    }
}